Right To Bear 9MM Upper + Barrel + BCG Combo Build Kit - 1/2 x 28 This combo kit comes with the 9mm Right to Bear Barrel of your choice, a slick side 9mm (.22LR compatible) upper receiver, and a 9mm AR9 bolt assembly. The Right To Bear 9mm Barrels are machined in house on state-of-the-art CNC machines and are thoroughly inspected at multiple stages of the build process to ensure quality. These barrels are machined from 4150 Chrome Moly Vanadium Steel and have a 1:10 twist rate. The final process is a salt bath Nitride finish for an added layer of protection.The RTB Upper is made from forged 7075-T6 aluminum and is Hard Coat Anodized. It meets military specifications and comes in a slick side configuration. The ejection port door is sized for 9mm and 22LR. This upper does have a shell deflector, but does not have a forward assist. This 9mm BCG is perfect for your 9mm Pistol Caliber AR-15 Build. Due to the increased rearward velocity, blowback AR systems require a heavier carrier. 8620 Steel Carrier Body with a tool steel extractor bolt carrier group. Carrier is engraved with "Made in the USA". This Bolt Carrier group is nitride QPQ Treated with a Rockwell rating of 72 giving you the hardness needed to withstand thousands of rounds of usage. It is fully assembled ready to install. For use with both Glock and Colt pattern lowers.**Disclaimer** These barrels have no Index pin or dedicated feed ramps Features: Barrel Specifications Length 4.5" Material 4150 Chrome Moly Vanadium Profile Government Finish QPQ Corrosion Resistant Gas System Length Blowback Gas Block Journal N/A Twist Rate 1:10 Muzzle Thread 1/2x28 TPI Weight 8oz Barrel Extension Integrated Target Crown 11 Degree Barrel Specifications Length 5.5" Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Gas Block Journal .N/A Twist Rate 1:10 Muzzle Thread 1/2x28 TPI Weight 9.6oz Barrel Extension Integrated Target Crown 11 Degree Barrel Specifications Length 8.3 Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Gas Block Journal None Twist Rate 1:10 Muzzle Thread 1/2x28 TPI Weight 13.6oz Barrel Extension Integrated Target Crown 11 Degree Barrel Specifications Length 11" Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Twist Rate 1:10 Muzzle Thread 1/2x28 Weight 17.6oz Barrel Specifications Length 16" Material 4150 Chrome Moly Vanadium Profile Straight Finish QPQ Corrosion Resistant Gas System Length Blowback Gas Block Journal N/A Twist Rate 1:10 Barrel Extension Integrated Target Crown 11 Degree Upper Machined from a Mil-Spec 7075 T6 forging Type III Hardcoat Anodized finish These uppers are machined to extremely tight tolerances for a more accurate build. Seating the barrel may take additional force. Light taps with a rubber mallet will do the trick. Please Note: These uppers are only compatible with .22LR and smaller pistol caliber rounds, such as 9mm and .40Bolt Assembly (BCG) 8620 Steel Carrier Engraved with "Made in the USA" S7 Tool Steel Extractor 4140 Steel Gas Key 8620 Steel Weight 8670 Steel firing pin Hard Chrome Coated Mil-Spec fasteners and staked properly Both Glock and Colt pattern compatibility DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols. SKU: UPC: